EP0197780A3 - Récipient en polyester avec une partie filetée, orientée et cristallisée pour utilisation de remplissage à chaud et son procédé de fabrication - Google Patents

Récipient en polyester avec une partie filetée, orientée et cristallisée pour utilisation de remplissage à chaud et son procédé de fabrication Download PDF

Info

Publication number
EP0197780A3
EP0197780A3 EP19860302520 EP86302520A EP0197780A3 EP 0197780 A3 EP0197780 A3 EP 0197780A3 EP 19860302520 EP19860302520 EP 19860302520 EP 86302520 A EP86302520 A EP 86302520A EP 0197780 A3 EP0197780 A3 EP 0197780A3
Authority
EP
European Patent Office
Prior art keywords
preform
jar
bottle
oriented
crystallized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19860302520
Other languages
German (de)
English (en)
Other versions
EP0197780A2 (fr
Inventor
Wayne N. Collette
Donald R. Demanche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Graham Packaging Pet Technologies Inc
Original Assignee
Continental PET Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental PET Technologies Inc filed Critical Continental PET Technologies Inc
Publication of EP0197780A2 publication Critical patent/EP0197780A2/fr
Publication of EP0197780A3 publication Critical patent/EP0197780A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6604—Thermal conditioning of the blown article
    • B29C49/6605—Heating the article, e.g. for hot fill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0039—Amorphous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/004—Semi-crystalline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0041—Crystalline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0053—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/907—Direct application of fluid pressure differential to shape, reshape, i.e. distort, or sustain an article or preform and crystallizing of nonstretched or molecularly unoriented portion thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/91—Product with molecular orientation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1397—Single layer [continuous layer]

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Polyesters Or Polycarbonates (AREA)
EP19860302520 1985-04-05 1986-04-04 Récipient en polyester avec une partie filetée, orientée et cristallisée pour utilisation de remplissage à chaud et son procédé de fabrication Withdrawn EP0197780A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US720504 1985-04-05
US06/720,504 US4618515A (en) 1985-04-05 1985-04-05 Polyester container with oriented, crystallized thread finish for hot fill applications and method of making same

Publications (2)

Publication Number Publication Date
EP0197780A2 EP0197780A2 (fr) 1986-10-15
EP0197780A3 true EP0197780A3 (fr) 1987-01-07

Family

ID=24894233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860302520 Withdrawn EP0197780A3 (fr) 1985-04-05 1986-04-04 Récipient en polyester avec une partie filetée, orientée et cristallisée pour utilisation de remplissage à chaud et son procédé de fabrication

Country Status (8)

Country Link
US (1) US4618515A (fr)
EP (1) EP0197780A3 (fr)
JP (1) JPS61293829A (fr)
AU (1) AU579720B2 (fr)
CA (1) CA1266837A (fr)
DK (1) DK153686A (fr)
FI (1) FI861459A7 (fr)
NO (1) NO861332L (fr)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
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US4665682A (en) * 1985-05-03 1987-05-19 Continental Pet Technologies, Inc. Method for producing a hot fillable, collapse resistant polyester container without the need to utilize set process techniques and/or non-conventional container geometries
US4863046A (en) * 1987-12-24 1989-09-05 Continental Pet Technologies, Inc. Hot fill container
US4927680A (en) * 1987-12-24 1990-05-22 Continental Pet Technologies, Inc. Preform and method of forming container therefrom
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US5067622A (en) * 1989-11-13 1991-11-26 Van Dorn Company Pet container for hot filled applications
US5198248A (en) * 1990-03-05 1993-03-30 Continental Pet Technologies, Inc. Blow mold for forming a refillable polyester container
US5066528A (en) * 1990-03-05 1991-11-19 Continental Pet Technologies, Inc. Refillable polyester container and preform for forming the same
JP3128764B2 (ja) * 1990-10-19 2001-01-29 三井化学株式会社 炭酸飲料用飽和ポリエステル製ボトル
DE4107011A1 (de) * 1991-03-05 1992-09-10 Wild Rudolf Gmbh & Co Verfahren und vorrichtung zum herstellen blasgeformter hohlkoerper
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US5281387A (en) * 1992-07-07 1994-01-25 Continental Pet Technologies, Inc. Method of forming a container having a low crystallinity
US5474735A (en) * 1993-09-24 1995-12-12 Continental Pet Technologies, Inc. Pulse blow method for forming container with enhanced thermal stability
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US20050260371A1 (en) * 2002-11-01 2005-11-24 Yu Shi Preform for low natural stretch ratio polymer, container made therewith and methods
US20040091651A1 (en) * 2002-11-01 2004-05-13 Mark Rule Pet copolymer composition with enhanced mechanical properties and stretch ratio, articles made therewith, and methods
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US7531125B2 (en) * 2003-08-25 2009-05-12 Ring Container Technologies Blow molded wide mouth pet container and method of manufacture
US20050221036A1 (en) * 2004-04-01 2005-10-06 The Coca-Cola Company Polyester composition with enhanced gas barrier, articles made therewith, and methods
US7572493B2 (en) * 2005-05-11 2009-08-11 The Coca-Cola Company Low IV pet based copolymer preform with enhanced mechanical properties and cycle time, container made therewith and methods
US7820257B2 (en) * 2005-05-11 2010-10-26 The Coca-Cola Company Preforms for preparing lightweight stretch blow molded PET copolymer containers and methods for making and using same
US20070045216A1 (en) * 2005-08-03 2007-03-01 Graham Packaging Company, L.P. Plastic container finish with structural rib
WO2007056248A2 (fr) * 2005-11-04 2007-05-18 Smucker Fruit Processing Company Bouteille a verseur antigoutte profile au laser
JP5063935B2 (ja) * 2006-06-02 2012-10-31 東洋製罐株式会社 燃料電池カートリッジ用ポリエステル製容器
US7770745B2 (en) * 2006-06-19 2010-08-10 Amcor Limited Wide mouth jar with integral scraper
EP1997603A1 (fr) * 2007-05-31 2008-12-03 Alliance for business solutions A4BS Systèmes canaux chauffés modifiés pour moulage par soufflage à injection
US7866496B2 (en) 2007-09-21 2011-01-11 Stokely-Van Camp, Inc. Lightweight finish for hot-fill container
JP5614609B2 (ja) * 2009-08-31 2014-10-29 株式会社吉野工業所 合成樹脂製壜体及びその製造方法
US9567128B2 (en) * 2010-12-09 2017-02-14 Ring Container Technologies Wide mouth container and method of making the same
PL2739551T3 (pl) * 2011-08-01 2018-03-30 Graham Packaging Co Pojemnik aerozolowy z tworzywa sztucznego oraz sposób wytwarzania
WO2013125401A1 (fr) * 2012-02-23 2013-08-29 日精エー・エス・ビー機械株式会社 Procédé de moulage par soufflage, moule de soufflage et récipient moulé par soufflage
US10737822B2 (en) * 2015-03-30 2020-08-11 Ring Container Technologies, Llc Container and method of manufacture
ES1228596Y (es) * 2019-03-29 2019-07-25 Partner Local Grup S L Botella o recipiente con boca cortada
WO2025225500A1 (fr) * 2024-04-23 2025-10-30 キョーラク株式会社 Récipient double, son procédé de production et procédé de production de récipient

Citations (8)

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FR2320176A2 (fr) * 1975-08-06 1977-03-04 Carnaud Total Interplastic Procede de fabrication de corps creux en matiere plastique a l'aide de preformes, corps creux obtenus et preformes pour leur obtention
GB2015914A (en) * 1978-03-13 1979-09-19 Plm Ab Making a reinforced container of thermo-plastics material by blow moulding
FR2429660A1 (fr) * 1978-06-29 1980-01-25 Yoshino Kogyosho Co Ltd Recipient de polyester et son procede de moulage par soufflage
AU514839B2 (en) * 1979-08-31 1981-02-26 Yoshino Kogyosho Co., Ltd. Producing saturated polyester resin bottles
EP0057504A1 (fr) * 1981-01-29 1982-08-11 Yoshino Kogyosho Co., Ltd. Récipient en téréphtalate de polyéthylène ou en résine de polyester saturée
EP0073151A2 (fr) * 1981-08-20 1983-03-02 Yoshino Kogyosho Co., Ltd. Procédé de moulage par soufflage d'un récipient moulé par soufflage en forme de bouteille
WO1983001766A1 (fr) * 1981-11-23 1983-05-26 Continental Group Conteneur moule par soufflage et son procede de fabrication

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AU5567986A (en) 1986-10-09
DK153686D0 (da) 1986-04-04
FI861459A0 (fi) 1986-04-04
AU579720B2 (en) 1988-12-08
NO861332L (no) 1986-10-06
DK153686A (da) 1986-10-06
CA1266837A (fr) 1990-03-20
EP0197780A2 (fr) 1986-10-15
FI861459A7 (fi) 1986-10-06
US4618515A (en) 1986-10-21
JPS61293829A (ja) 1986-12-24

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